How many combinations are possible on a 4 number computer cable lock. each space can be any number 0-9 . the only exception is that all four numbers cannot be the same. how many combinations are possible ?

Shiny white dental insurance costs $258 per year. approximately one-third of insured people need a filling, which averages $110 each. 80% of insured people get a preventive check-up each year, and the average cost of this visit is $95. if you consider shiny white’s income and expenses, what is the expected value of each insured customer?

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?